border-1px($color)
  position : relative
  &:after
    display : block
    position : absolute
    left : 0
    bottom : 0
    width : 100%
    border-top : 1px solid $color
    content : ' '
    

bg-image($url)
	background-image:url($url + "@2x.png")
	@media (-webkit-min-device-pixel-ratio: 3),(min-device-pixel-ratio: 3)
		background-image: url($url + "@3x.png")
		

body,html
	line-height: 1
	font-weight:200
	font-family: "PingFang SC","Helvetica-Light"
	// padding-top:5px

